Process for sulphonation of oils or fatty matters



- ment of such diluents or solvents,

Patented July 28, 1931 UNITED STATES PATENT oFFIcE HEINRICH BERTSGH, or cnmmrrz, GERMANY, assreuon r0 n. ma. 3611MB AKTIEN- GESELLSOHAFT, OF GEEMNITZ, SAXONY, GERMANY,

A COMBANY OF GERMANY.

PROCESS FOB SULPHONATION OF OILS OR FATTY MATTER$ No Drawing. Application filed January 25,

A further object is to adapt oils or fatty matters for successful treatment under the low temperature conditions.

In treating fatty acids or glycerides for obtaining sulphonated oil products, certain standard rules are generally observed in all places of manufacture. In the first place, the operation of about 30 C. and, in. the second place, the quantity of sulphuric acid employed does not exceed about 33 %.of the oil to be treated.

According to this invention, the sulphonation is performed with a large excess of sulphuric acid and at temperatures below zero centigrade. Temperatures round about 10 C. have proved particularlysuitable. The products obtained by this improved process have an increased value, especially due to the fact that they are highly resistant to lime, acid and magnesia.

In viewof the fact that the fatty material to be treated may poss1bly thicken considerably or become unduly viscous at the low temperatures employed it may be preferable to treat them with diluents or solvents which do not react with the sulphuric acid under the conditions prevailing. The employor the nature of the diluents or solvents employed, may depend upon the material to be treated and the nature of the agitating apparatus available. Moreover, the nature of the diluents or solvents must be such that they do not mix or combine with the diluted sulphuric acid separating out after the washing of the products. As an example of diluents or solvents possessing the desired characteristics, mention may be made of hydrocarbons, halogenated hydro-carbons and the like. Inactive solvents which may be used in the process may include .for example: benzol, toluol, trichlorethylene, carbon tetrachloride, ethyl ether.

is carried out at temperatures 1928, Serial No. 249,503, and in Germany January 27, 1927.

The improved process, which differs from those heretofore practised in the respects already mentioned, yields products similar to Turkey-red oils but many times superior in effect to products previously obtained.

The new products are particularly char- 7 acterized by an extraordinarily high resistance to acid, lime, and magnesia salts.

The practical carrying out of the invention is best illustrated by the following example To 100 kgs. of ricinoleic fatty acid there are added 50 kgs. of benzol, and the mass is cooled to a temperature of 10 C. At

this temperature, and whilst stirring, the mass is treated by slowly adding'lOO kgs. of sulphuric acid at 66 B., the reaction being permitted to continue until samples withdrawn from the mass are found to be soluble in water. Washing and neutralization of the product of the reaction are carried out in the usual manner of preparing Turkey-red oil.

I claim:

1. A process for sulphonation of fatty matters comprising the treatment of the fatty matters with an excess of sulphuric acid at a temperature substantially below zero centigrade, as for example 10 C.

2. A process for sulphonation of fatty matters comprising the preliminary treatment of the fatty matters with a thinning medium which is not reactive to sulphuric acid under the working conditions, and treating the thinnedfatty matters with an excess of sulphuric acid at a temperature less than 0 C.

3. A process for sulphonation of fatty matters comprising the preliminary treating the resultant mixture to about 10 C.,.

treatin the cooled mixture with an addition 0 an excess of sulphuric acid whilst stirring, substantially as set forth.

5. A process for sulphonation of fatty matters comprising the preliminary addition to a mass of fatty matter of a quantity of hydrocarbon, cooling the resultant mass to a temperature of about -10 (1, adding to the mass slowly and with agitation a quantity of sulphuric acid about equal in weight to the weight of the original fatty matter, and separating, washing and neutralizing the sulfihonated product substantially as set fort DR. HEINRICH BERTSCH. 

